Correy says... Franz, Avocado Trees are very difficult to grow in pots due to requiring near perfect drainage.

At the nursery you will notice that they sell avocado tree in the larger 6 litre bags rather then the smaller pots and even then you require quick turn around otherwise they will suffer even in these big bags.

The best way to set up an avocado tree is a 1-1.5m mound. It has been suggested to get a big tractor tyre and in the middle of this you could put lots of good drainage soil or the best quality potting mix you can find.

If you did want to keep your avocado small then why not keep it down by pruning.

Many people rave about the Secondo avocado boasting they get fruit in the second year.